UO-EGS / UO-SGS Speed Switch Module



U-ONE Generation II (LWL) – speed switch module

System solution U-ONE(-SAFETY)-LWL

  • Monitor overspeed and underspeed by means of 3 configurable speed switches equipped with positively driven relays
  • Easy configuration instead of complicated PLC programming
  • Switching capacity up to 250 VAC / 500 mA or 230 VDC / 180 mA
  • Options: Without SIL/PL certification (UO-EGS-R); combine up to 6 speed switches (= 2 modules)

Incremental encoders Overspeed switches

U-ONE Generation II (LWL) – speed switch module

The speed switch modules of the U-ONE(-SAFETY) second generation are electronic overspeed switches that monitor the defined speeds for overspeed and underspeed. They are equipped with hysteresis, a switching delay, a switching function dependent on the direction of rotation and the option of performing a switch test and can be parameterized as reliable error switches. The parameterization is carried out using input masks, meaning that complex SPS programming is not necessary. The modules are optionally available as certified up to SIL 2 / PL d.

Technical Data


Supply voltage Power supplied via controller module
Signal outputs/Interfaces
  • 3 configurable speed switches, 2 NO contacts per switch, potential-free relay contacts with switching capacity:
    • 5…250 V / 5…500 mA  AC
    • 5…30 V / 5…500 mA  DC
    • 30…230 V / 5…180 mA DC
  • 1 switch configurable as error switch (e. g. emergency stop circuit)
  • Configurable functions: Hysteresis, delay, switching independent of rotational direction, safe error switch, switch test diagnostics
  • LED indicators: Operating conditions/warning
Electrical connection
  • Number of screw terminals and function:
    • 4: Switch S1 (each 2 NO contacts)
    • 4: Switch S2 (each 2 NO contacts)
    • 4: Switch S3 (each 2 NO contacts)
  • Internal bus connection to preceding and following modules
Dimensions 100 x 25 x 110 mm (modular electronics housing for DIN rail bus connector)
Device temperature range -25 °C to +60 °C
Degree of protection IP20 (switchboard installation)
Device options
  • Combines with other modules belonging to the U-ONE(-SAFETY)-LWL-System
  • Combines up to 6 speed switches (= 2 modules)
  • Maximum 15 switches per system, of which maximum 6 speed switches
Mechanical options
Special features and certificates USL(H) 42 and associated modules UO-S…: SIL 2 (DIN EN 61508); PL d (DIN EN ISO 13849)



U-ONE(-SAFETY) – Generation II (de/en)


Inquiry forms


UO-EGS-R / UO-ERC-R (en)
Operating and assembly instructions


UO-SGS-R / UO-SRC-R (en)
Operating and assembly instructions


U-ONE(-SAFETY)-LWL / US42Pro (de/en)

Software i


EU declaration of conformity